Inductance device



Nov. 2 1926. 1,605,557

M. OSNOS INDUCTANCR DEVICE Filed Oct. 20, 1925 10 F k L l] 20 b INVENTORMENDEL OSNOS BY A ' AT ORNEY following Patented Nov. 2,1926.

UNITED STATE 5 PATENT. OFFICE.

IENDEL OSNOS, 0]! BERLIN,

LOSE TELEGRAPIQIIE M. B. CORPORATION OF GERMANY.

INDUCTANGE DEVICE.

Application filed October 20, 1925, Serial No.

The invention relates to the construction of inductance devices, suchcoils, static frequency changers and the like, and, more particularly,to an inductance device "made up of a conductor having a core ofconducting material surrounded by a layer of magnetic material such asdisclosed in German application No. T-29246 filed in Germany September5, 1924, corresponding U. S. application being filed under Serial No.63,617, filed Oct. 20, 1925.

The invention comprises the provision of a frame on which the conductormay be wound in order to allow a desirable length of conductor to beused and yet to prevent adjacent portions of the conductor from touchingeach other.

An object of the invention is to provide a device of the above indicatedconstruction which will be cheap to make and yet reliable and eflicientin operation.

Other ob'ects will be apparent from the escri tion and appended claimswhen considere with the accompanying drawing in which, p

Fig. 1 represents a device according to the invention,

Fig. 2 represents struction,

Fig. 3 1s a detail of the construction shown in Fig. 2, and, M

Fig. 4 is a cross-section of the novel conductor used, greatlyexaggerated.

The present invention relates to a particularly convenientconstructional formation of the fieqllien changer ent app fcation. If,in accordance with the parent application the conductor of thefrequencychanger is d bifilar fashion or liriilg-zag fashion, spreadingapart of the pa el portions of the conductor, or, what is worse, theirtouching possibly produced as a consequence of thermal expansion must beprevented. For this purpose, in conformity with the invention, theconductor 1s arranged in a way so that it is subject to tension, theforce needed therefor being proiiiiiced by a spring, a pull-off weight,or the e. Referring to Fi 1 the conductor 10 which is wound dou le, themiddle being denoted by m, is stretched on two carrier members b, b,which are kept apart, for instance, by two comp springs f, the middle ma different form of conas used for choke according to the par- 63,616,and in Germany September 17, 1924.

and the ends a and e of the conductor being fastened to the carriers inany desired manner. The carriers, or at least the portions thereofcoming in contact with the conductor are made up of insulating materialas, for instance, porcelain, and theyv are suitably provided withgrooves or furrows 20-to preserve proper distance between the conductorturns.

The conductor 10 may be made up of a conducting core 11 such as copper,surrounded by a layer 12 of magnetic material such as iron or some alloythereof. The-layer of I magnetic material is preferably quite thin,

- of the conductor 10 being again fastened fixedly to the carriers asindicated or at the frame or support.

The turns of the conductor 10 are largely omitted, parts of the turnsbeing shown dotted for the sake of clearness. The frame or support a maybe made of any insulating material, such as'wood, slate, asbestos,soapstone or the like.

Some or all of the carriers b are disposed in radial passages 30 in theends of the corresponding arms 0, the carriers 6 beinig firmly pressedagainst the conductor 10 by the springs 7 located between the bottoms ofthe passages 30 and the adjacent ends of the carriers 6.

Having described my invention, I am entitled to all modifications.thereof as fall fairly-within its spirit and scope as set forth in thefollowing claims:

1. An inductance device, comprising a 'in the cross-section area.

2. An inductance 'device, comprising a conductor having a core ofconducting material surrounded by a layer of magnetic material, asupportingfframe comprising a plurality of carriers, said conductorbeing Wound double around said carriers, and means for resilientlyholding said conductor tight with respectto said carriers so that therewill be no variance of impedance due to a change of shape in thecross-section area of the conductor.

' 3. An inductance device, comprising a conductor having a core ofconducting material surrounded by a layer of magnetic material, a framehaving a plurality of carrier members provided with conductor holdinggrooves, said conductor being wound double around said carriers with itsmiddle fixed toa carrier member and-its ends also fixed'to" a carriermembeiyand means including springs between said carriers for resilientlyholding said conductor tight so that there will be no change intheimpedance in the coil due to a varying cross-sec- .tion area.

4. An inductance device, comprising a conductor, a supporting framehaving a plurality of radially extending arms, said arms having carrierholding passages in the ends thereof, carriers in said passages, saidcarriers having conductor holding grooves, said conductor being disposedin said grooves and Wound double around said carriers with its middlefixed to a carrier and its ends also fixed to a carrier, and springs insaid passages for resiliently holding said conductor tight so that therewill be no impedance change in the bi-filar winding due to a varyingcross-section area.

5. An inductance device, comprising a conductor having a core ofconducting material surroundded by a layer of magnetic material, asupporting frame having a plurality of radially extending arms, saidarms having carrier holding passages in the ends.

thereof, carriers in said passages, said oarriers havingconductor-holding grooves, said conductor being disposed in said groovesand wound double around said carriers with its middle fixed to a carrierand its ends also fixed to a carrier, and springs in said passages forresiliently holding said conductor tight so that there will be noimpedance change in the bi-filar Winding due to a varying cross-sectionarea.

MENDEL osNos.

